Summary: A Study of Diagrammatic Ink in Lecture
Richard Anderson a
Ruth Anderson b
Crystal Hoyer a
Craig Prince a
Jonathan Su a
Fred Videon a
Steven Wolfman c
aDept. of Computer Science and Engr., Univ. of Washington, Seattle, WA 98195
bDept. of Computer Science, Univ. of Virginia, Charlottesville, VA 22904
cDept. of Comp. Sci., U. of British Columbia, Vancouver, BC, Canada, V6T 1Z4
Abstract
In this paper, we present a study of how instructors draw diagrams in the process
of delivering lectures. We are motivated by wanting to understand challenges and
opportunities for automatically analyzing diagrams, and to use this to improve tools
to support the delivery of presentations and the viewing of archived lectures. The
study was conducted by analyzing a large group of examples of diagrams collected
from real lectures that were delivered from a Tablet PC. The main result of the paper
is the identification of three specific challenges in analyzing spontaneous instructor
diagrams: separating the diagram from its annotations and other surrounding ink,